Example 5

作者：Walch Education

主題：角度, 圓

A circle has a diameter of

feet. Find the length of an arc intercepted by a central angle measuring

.

Find the circumference of the circle.
Set up a proportion.
Multiply both sides by to find the arc length.

This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit www.walch.com for more information.

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